Home / 21,415.31-29,552.50-11,855.58

Finding the Fourth Proportional to 21,415.31, 29,552.50 and 11,855.58

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Solution

The fourth proportional to 21,415.31, 29,552.50 and 11,855.58 is: 16,360.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.31 : 29,552.50 = 11,855.58 : x
  2. Step 2: Convert to fraction form
    21,415.31/29,552.50 = 11,855.58/x
  3. Step 3: Cross multiply
    21,415.31x = 29,552.50 × 11,855.58
  4. Step 4: Simplify right side
    21,415.31x = 350,362,027.95
  5. Step 5: Solve for x
    x = 350,362,027.95/21,415.31
  6. Step 6: Final answer
    x = 16,360.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.